body{
    display: flex;
    justify-content: center;
}
#app{
    width: 60%;
    height: 400px;
    border: 1px solid rosybrown;
    display: flex;
    flex-direction: column;/*垂直为主轴*/
    justify-content: center;
    align-items: center;/*水平为副轴*/
}
#app>.serach{
    width: 80%;
    height: 100%;
    outline: none;
    border: 1px solid #9393ee;
    float: left;
}
#app.doSerach{
    width: 15%;
    height: 110%;
    background-color: #9393ee;
    color: white;
}

ul{
    width: 90%;
    height: 200px;
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: row;
    justify-content: center;
}
ul li{
    width: 16%;
    height: 100%;
    border-right: 1px solid blueviolet;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
